Fire Extinguisher Type?

Simmo2300

I'm a little confused. I have read the various advice sheets from CC and they adivise carrying a AFFF fire extinguisher. However looking at the owners manuals online for the two vans on my shortlist (Bailey Unicorn Vigo & Sterling Eccles SE Quartz) they
both advise Dry Powder. Your thoughts/advice/recommendations would be appreciated.